/**
 * Copyright 2020-9999 the original author or authors.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.binghe.concurrent.chapter03;

import java.util.*;

/**
 * @author binghe
 * @version 1.0.0
 * @description 包装后的线程安全的HashSet
 */
public class SafeHashSet<E> {

    private volatile Set<E> set = new HashSet<>();

    public synchronized boolean add(E e){
        return set.add(e);
    }

    public synchronized boolean isEmpty(){
        return set.isEmpty();
    }

    public synchronized boolean remove(Object o){
        return set.remove(o);
    }

    public synchronized void clear(){
         set.clear();
    }
}
